JP6347120B2 - Embankment reinforcement structure - Google Patents

Embankment reinforcement structure Download PDF

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JP6347120B2
JP6347120B2 JP2014043498A JP2014043498A JP6347120B2 JP 6347120 B2 JP6347120 B2 JP 6347120B2 JP 2014043498 A JP2014043498 A JP 2014043498A JP 2014043498 A JP2014043498 A JP 2014043498A JP 6347120 B2 JP6347120 B2 JP 6347120B2
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embankment
steel sheet
sheet pile
steel
pile wall
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JP2015168952A (en
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覚太 藤原
覚太 藤原
裕章 中山
裕章 中山
幸夫 阿部
幸夫 阿部
和孝 乙志
和孝 乙志
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Nippon Steel Corp
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Description

本発明は、河川等の堤防、道路・鉄道盛土等の河川、道路、鉄道等に沿って長く延在する盛土補強構造に関する。   The present invention relates to an embankment reinforcement structure extending along a river, road, railway embankment, or other river, road, railway embankment, or the like.

従来、河川等の堤防の盛土(堤体)に対する補強として、盛土の法面に透水性の低い材料や不透水性の材料を被覆することや、盛土の法面の下端側になる法尻部分に、盛土の延在方向(連続方向)に沿って地中に鋼矢板壁を構築することが知られていた。   Conventionally, as a reinforcement for embankments (bank bodies) of embankments such as rivers, the slope of the embankment is covered with a material with low water permeability or imperviousness, or the bottom edge on the bottom of the slope of the embankment In addition, it has been known to construct a steel sheet pile wall in the ground along the extending direction (continuous direction) of the embankment.

しかし、法面の被覆では、盛土自体の強度の補強にならず、地震や洪水の際に、大きな外力が盛土に作用した場合の盛土の破壊を防止することができない。また、盛土基礎地盤の安定化を図り、前記漏水を防止する上では、上述のように法尻部分に鋼矢板壁を配置するのは有効であるが、洪水時に越水した場合には、法尻部分の鋼矢板壁では、盛土が崩壊するのを防止することができない。   However, the slope covering does not reinforce the strength of the embankment itself, and cannot prevent the embankment from being destroyed when a large external force acts on the embankment during an earthquake or flood. In addition, in order to stabilize the embankment foundation ground and prevent the leakage of water, it is effective to arrange the steel sheet pile wall at the butt as described above. It is impossible to prevent the embankment from collapsing at the steel sheet pile wall at the bottom.

このような問題を解決するために特許文献1および2に記載の技術が知られている。
特許文献1に記載の技術は、図5に示すように、連続する盛土1の法肩部に、鋼矢板2からなる鋼矢板壁3を盛土1の連続方向に沿って2列設け、当該鋼矢板壁3を支持層4まで根入れすることで、地震時や洪水時等の盛土を崩壊させようとする外力に対して盛土1を補強するものである。
特に両法肩部に対向して設けられた鋼矢板壁3,3は、盛土1の天端付近でタイロッド等の連結材6で結合されており、このような構造は、鋼矢板壁3,3によって締め切られた範囲内において構造安定性が高まり、地震時における盛土の沈下抑制効果および洪水時の破堤防止効果が期待される。
In order to solve such a problem, techniques described in Patent Documents 1 and 2 are known.
As shown in FIG. 5, the technique described in Patent Document 1 is provided with two rows of steel sheet pile walls 3 made of steel sheet piles 2 along the continuous direction of the embankment 1 on the shoulder portion of the continuous embankment 1. By embedding the sheet pile wall 3 up to the support layer 4, the embankment 1 is reinforced against an external force that tries to collapse the embankment during an earthquake or a flood.
In particular, the steel sheet pile walls 3, 3 provided facing both shoulders are connected by a connecting member 6 such as a tie rod near the top end of the embankment 1, and such a structure is formed by the steel sheet pile walls 3, 3. The structural stability is enhanced within the area closed by 3 and expected to prevent embankment settlement during earthquakes and prevent bank breakage during floods.

また、特許文献2に記載の技術は、図6に示すように、連続する盛土1の法肩部に、鋼矢板2からなる鋼矢板壁3を盛土1の連続方向に沿って2列設け、当該鋼矢板壁3を支持層4より浅い深さ(液状化層5)で、かつ、地震時や洪水時に倒壊しない程度まで根入れした構造である。
鋼矢板壁3を支持層4まで根入れしないことで、当該鋼矢板壁3を構成する鋼矢板2の上下長が低減される上、地震時には液状化層5が液状化することで免震効果を発揮し、鋼矢板2に発生する応力が小さく抑えられ、必要断面性能が低減されることでコスト低減に寄与できる。また、盛土1の法尻部に鋼矢板2からなる鋼矢板壁3を施工し併用してもよい。
Moreover, as shown in FIG. 6, the technique described in Patent Document 2 is provided with two rows of steel sheet pile walls 3 made of steel sheet piles 2 along the continuous direction of the embankment 1 on the shoulder of the continuous embankment 1. The steel sheet pile wall 3 has a depth shallower than the support layer 4 (liquefaction layer 5) and has a structure in which the steel sheet pile wall 3 is not collapsed during an earthquake or a flood.
By not incorporating the steel sheet pile wall 3 to the support layer 4, the vertical length of the steel sheet pile 2 constituting the steel sheet pile wall 3 is reduced, and the liquefied layer 5 is liquefied at the time of an earthquake, so that the seismic isolation effect is obtained. The stress generated in the steel sheet pile 2 is suppressed to a small level, and the required cross-sectional performance is reduced, thereby contributing to cost reduction. Further, a steel sheet pile wall 3 made of a steel sheet pile 2 may be applied to the bottom of the embankment 1 and used together.

特開2003−13451号公報JP 2003-13451 A 特開2012−7394号公報JP 2012-7394 A

ところが、前記特許文献1に記載の技術では、支持層が地盤深くに位置する地盤条件では、鋼矢板壁を構成する鋼矢板の必要根入れが長く、多くの工期や工費が発生して、コスト高になる。
また、特許文献2に記載の技術では、鋼矢板壁を構成する鋼矢板を支持層より浅い部分で根入れできるため、根入れ長さが短く、コスト低減を図れるものの、鋼矢板が十分に根入れされた構造に比して、地震時に鋼矢板壁が沈下することで盛土沈下抑制効果や越水時の破堤抑止効果(盛土破壊抑止効果)が小さくなる可能性が考えられる。なお、模型堤防を対象とした加振実験により、鋼矢板が支持層まで根入れされていない状態では、地震時において鋼矢板が周辺地盤とともに沈下する挙動が確認されている。
また、盛土の法尻部に鋼矢板壁を併用した構造も考えられるが、工期や工費がかかる上、併用させることによる盛土沈下抑制効果の向上度合いは小さい。
However, in the technique described in Patent Document 1, in the ground conditions where the support layer is located deep in the ground, the steel sheet pile that constitutes the steel sheet pile wall requires a long period of time. Become high.
In the technique described in Patent Document 2, the steel sheet pile constituting the steel sheet pile wall can be rooted at a shallower portion than the support layer, so that the length of root penetration is short and the cost can be reduced, but the steel sheet pile is sufficiently rooted. Compared to the structure, the steel sheet pile wall sinks at the time of the earthquake, and it is possible that the bank settlement suppression effect and bank breakage suppression effect (banking failure suppression effect) during flooding may be reduced. In addition, by the vibration test for the model levee, in the state where the steel sheet pile is not embedded to the support layer, the behavior of the steel sheet pile sinking with the surrounding ground during the earthquake has been confirmed.
Moreover, although the structure which used the steel sheet pile wall together in the method bottom part of embankment is also considered, a construction period and construction cost start, and the improvement degree of embankment settlement suppression effect by using together is small.

本発明は、前記事情に鑑みてなされたもので、支持層が深くに位置する地盤条件に対しても、十分な地震時の盛土沈下抑制効果や越水時の破堤抑止効果(盛土破壊抑止効果)を期待でき、かつ、コストを低減できる盛土補強構造を提供することを目的としている。   The present invention has been made in view of the above circumstances, and even for ground conditions where the support layer is located deeply, it is sufficient to suppress bank settlement during earthquakes and bank breakage suppression effects during bank overflow (banking failure suppression The object is to provide an embankment reinforcement structure that can be expected to be effective and can reduce costs.

前記目的を達成するために、本発明の盛土補強構造は、連続する盛土の略天端の範囲内に、鋼矢板および/または鋼管矢板からなる鋼矢板壁が、前記盛土の連続方向に沿って1列以上設けられ、前記鋼矢板壁が支持層より浅い深さまで根入れされた盛土補強構造において、
前記盛土の法尻部に、前記支持層まで根入れされた鋼製支持材が前記盛土の連続方向に所定間隔で離散的に配置され、
前記鋼矢板壁と前記各鋼製支持材とがそれぞれ第1連結材によって結合されることによって、前記鋼矢板壁が前記第1連結材を介して前記鋼製支持材によって支持され、
前記第1連結材は、前記盛土の法面に沿って設けられ、
前記盛土の連続方向において隣り合う前記鋼製支持材に連結された前記第1連結材が交差していることを特徴とする。
In order to achieve the above object, the embankment reinforcing structure of the present invention includes a steel sheet pile wall made of steel sheet piles and / or steel pipe sheet piles in a continuous direction of the embankment, in the range of the approximate top end of continuous embankments. In the embankment reinforcement structure in which one or more rows are provided and the steel sheet pile wall is embedded to a depth shallower than the support layer,
The steel support material rooted up to the support layer is discretely arranged at a predetermined interval in the continuous direction of the embankment at the bottom of the embankment,
The steel sheet pile wall is supported by the steel support material via the first connection material by the steel sheet pile wall and the steel support materials being coupled by the first connection material, respectively.
The first connecting member is provided along the slope of the embankment,
The first connecting members connected to the steel support members adjacent to each other in the continuous direction of the embankment intersect with each other .

本発明においては、盛土の天端の範囲内に設けられる鋼矢板壁は、支持層より浅い深さまでしか根入れされていない。盛土の法尻部に設けられる鋼製支持材は支持層まで根入れされているが、盛土の連続方向に所定間隔で離散的に配置されているので、支持層まで根入れされた鋼矢板壁を盛土の連続方向に沿って連続して設けられている構造に比して、工期や工費を低減してコストの低減を図ることができる。
また、鋼矢板壁と各鋼製支持材とがそれぞれ第1連結材によって結合されることによって、鋼矢板壁が第1連結材を介して前記鋼製支持材によって支持されているので、地震時に盛土内部の鋼矢板壁の沈下を抑えることができ、地震時の盛土沈下抑制効果や越水時の破堤抑止効果(盛土破壊抑止効果)が期待される。
したがって、支持層が深くに位置する地盤条件に対しても、十分な地震時の盛土沈下抑制効果や越水時の破堤抑止効果を期待でき、かつ、盛土の略天端の範囲内に設けられた鋼矢板壁の下端は液状化層に留めて、法尻部の鋼製支持材は盛土の連続方向に所定間隔で離散的に設置し、これらを第1連結材で結合させることで、上記効果を維持したままコストの低減を図ることができる。
また、盛土の連続方向に卓越する加振に対しても、盛土の補強効果を発揮することができる。
In the present invention, the steel sheet pile wall provided in the range of the top of the embankment is rooted only to a depth shallower than the support layer. Although the steel support material provided at the embankment of the embankment is rooted up to the support layer, it is discretely arranged at predetermined intervals in the continuous direction of the embankment, so the steel sheet pile wall rooted up to the support layer Compared to the structure continuously provided along the continuous direction of the embankment, the construction period and construction cost can be reduced and the cost can be reduced.
Moreover, since a steel sheet pile wall is supported by the said steel support material via the 1st connection material by each connecting a steel sheet pile wall and each steel support material by the 1st connection material, at the time of an earthquake The settlement of the steel sheet pile wall inside the embankment can be suppressed, and the embankment settlement suppression effect at the time of an earthquake and the bank breakage suppression effect (banking failure suppression effect) at the time of overflow are expected.
Therefore, even for ground conditions where the support layer is located deeply, it can be expected to have a sufficient effect of suppressing bank settlement during earthquakes and bank breakage during flooding, and within the range of the top of the bank. The bottom end of the steel sheet pile wall was fixed to the liquefied layer, the steel support material of the buttock part was discretely installed at a predetermined interval in the continuous direction of the embankment, and these were joined by the first connecting material, Costs can be reduced while maintaining the above effects.
Moreover, the reinforcement effect of embankment can be exhibited also with respect to the vibration which excels in the continuous direction of embankment.

また、本発明の別の盛土補強構造は、連続する盛土の略天端の両法肩部からそれぞれ下方に延在するようにして設けられた鋼矢板および/または鋼管矢板からなる鋼矢板壁が、前記盛土の連続方向に沿って設けられ、前記鋼矢板壁が支持層より浅い深さまで根入れされた盛土補強構造において、
前記盛土の法尻部に、前記支持層まで根入れされた鋼製支持材が前記盛土の連続方向に所定間隔で離散的に配置され、
前記鋼矢板壁と前記各鋼製支持材とがそれぞれ第1連結材によって結合されることによって、前記鋼矢板壁が前記第1連結材を介して前記鋼製支持材によって支持され、
前記第1連結材は、地震時の前記盛土の慣性力に耐えることができ、かつ、前記支持層より浅い位置にある液状化層が液状化し支持力が期待できない状態でも前記鋼矢板壁の重量を支えることのできる強度を有し、前記盛土の両法肩部に前記鋼矢板壁が対向して設けられ、これら鋼矢板壁どうしが前記盛土の連続方向に所定間隔で離散的に配置された第2連結材によって連結され、前記第2連結材が交差していることを特徴とする。
本発明においては、地震時において盛土が震動したり沈下する場合においても、第1連結材が地震時の盛土の慣性力に耐えることができ、また、液状化層が液状化して鋼矢板壁の支持力が期待できない状態でも、第1連結材が鋼矢板壁の重量を支えることができる。したがって、当該第1連結材を介して鋼製支持材によって、盛土沈下や越水時の破堤(盛土破壊)を確実に抑止することができる。
また、本発明の前記構成において、前記鋼製支持材は、鋼管、鋼矢板、形鋼のうちの少なくともいずれかで1つで構成されていることが好ましい。
形鋼は、H形鋼、山形鋼、溝形鋼、I形鋼等のいずれの形鋼であってもよい。
Further, another embankment reinforcing structure of the present invention has a steel sheet pile wall made of a steel sheet pile and / or a steel pipe sheet pile provided so as to extend downward from both shoulders of the substantially top end of the continuous embankment. In the embankment reinforcement structure provided along the continuous direction of the embankment, the steel sheet pile wall is embedded to a depth shallower than the support layer,
The steel support material rooted up to the support layer is discretely arranged at a predetermined interval in the continuous direction of the embankment at the bottom of the embankment,
The steel sheet pile wall is supported by the steel support material via the first connection material by the steel sheet pile wall and the steel support materials being coupled by the first connection material, respectively.
The first connecting member can withstand the inertia force of the embankment at the time of an earthquake, and the weight of the steel sheet pile wall even when the liquefied layer at a position shallower than the support layer is liquefied and the support force cannot be expected. The steel sheet pile walls are provided opposite to both shoulders of the embankment, and the steel sheet pile walls are discretely arranged at predetermined intervals in the continuous direction of the embankment. It is connected by the 2nd connection material, The said 2nd connection material cross | intersects, It is characterized by the above-mentioned .
In the present invention, even when the embankment vibrates or sinks during an earthquake, the first connecting material can withstand the inertial force of the embankment during the earthquake, and the liquefied layer liquefies and the steel sheet pile wall is liquefied. Even in a state where the supporting force cannot be expected, the first connecting member can support the weight of the steel sheet pile wall. Therefore, bank subsidence or bank breakage (bank breaking) can be reliably suppressed by the steel support member via the first connecting member.
Moreover, the said structure of this invention WHEREIN: It is preferable that the said steel support material is comprised by at least any one of a steel pipe, a steel sheet pile, and a shaped steel.
The shape steel may be any shape steel such as H-shaped steel, angle steel, groove-shaped steel, and I-shaped steel.

このような構成によれば、鋼製支持材を容易に調達できるとともに、鋼矢板壁を第1連結材を介して確実に支持できる。   According to such a structure, while being able to procure a steel support material easily, a steel sheet pile wall can be reliably supported via a 1st connection material.

また、本発明の前記構成において、前記第1連結材は、前記盛土の法面に沿って設けられていてもよい。
ここで、第1連結材を盛土の法面に沿って設けるとは、第1連結材を盛土の法面から露出した状態で当該法面に沿わせるようにして設ける場合や、法面より若干下側において、当該法面によって隠された状態で当該法面に沿わせるようにして設けることを含む。
Moreover, the said structure of this invention WHEREIN: The said 1st connection material may be provided along the slope of the said embankment.
Here, providing the first connecting material along the slope of the embankment means that the first connecting material is provided so as to be along the slope while being exposed from the slope of the embankment, or slightly more than the slope. On the lower side, it is provided so as to be along the slope in a state hidden by the slope.

このような構成によれば、第1連結材が盛土の法面に沿って設けられているので、第1連結材の設置が容易であるとともに、当該第1連結材を鋼矢板壁の上端部と鋼製支持材の上端部とに容易に連結できる。   According to such a configuration, since the first connecting material is provided along the slope of the embankment, it is easy to install the first connecting material, and the first connecting material is connected to the upper end portion of the steel sheet pile wall. And can be easily connected to the upper end of the steel support.

また、本発明の前記構成において、盛土の両法肩部に前記鋼矢板壁が対向して設けられ、これら鋼矢板壁どうしが前記盛土の連続方向に所定間隔で離散的に配置された第2連結材によって連結されていてもよい。
この場合、鋼矢板壁に対する第1連結材の連結箇所と、第2連結材の連結箇所とは、盛土の連続方向において、同じ位置でも異なる位置でもよい。
Moreover, in the said structure of this invention, the said steel sheet pile wall is provided facing both the shoulders of embankment, and these steel sheet pile walls are discretely arrange | positioned by the predetermined interval in the continuous direction of the said embankment. It may be connected by a connecting material.
In this case, the connection location of the 1st connection material with respect to a steel sheet pile wall and the connection location of a 2nd connection material may be the same position or a different position in the continuous direction of embankment.

このような構成によれば、第1連結材と第2連結材の連結する位置を選定することで応力の発生箇所を分散させて調整することができる。   According to such a configuration, it is possible to disperse and adjust the location where the stress is generated by selecting a position where the first connecting material and the second connecting material are connected.

また、発明の前記構成において、前記第1連結材の少なくとも一部は前記盛土の内部に設けられていてもよい。   Moreover, the said structure of invention WHEREIN: At least one part of the said 1st connection material may be provided in the inside of the said embankment.

このような構成によれば、盛土の地盤が緩衝材となり、第1連結材に発生する曲げ変形が低減される。   According to such a structure, the ground of embankment becomes a buffer material and the bending deformation which generate | occur | produces in a 1st connection material is reduced.

また、本発明の前記構成において、前記第1連結材と、前記鋼矢板壁および/または前記鋼製支持材とはピン結合されていてもよい。   Moreover, the said structure of this invention WHEREIN: The said 1st connection material and the said steel sheet pile wall and / or the said steel support material may be pin-coupled.

このような構成によれば、第1連結材に作用する曲げ変形を低減させることができる。   According to such a configuration, bending deformation acting on the first connecting member can be reduced.

また、本発明の前記構成において、前記第1連結材には前記盛土の内部に埋め込まれるリブが前記第1連結材から突出して設けられていてもよい。   Moreover, the said structure of this invention WHEREIN: The rib embedded inside the said embankment may be provided in the said 1st connection material so that it may protrude from the said 1st connection material.

このような構成によれば、盛土の地盤からの抵抗が増し第1連結材の曲げ変形が低減される。   According to such a structure, the resistance from the ground of embankment increases and the bending deformation of a 1st connection material is reduced.

本発明によれば、支持層が深くに位置する地盤条件に対しても、十分な地震時の盛土沈下抑制効果や越水時の破堤抑止効果(盛土破壊抑止効果)を期待でき、かつ、コストの低減を図ることができる。   According to the present invention, even for ground conditions where the support layer is located deeply, it is possible to expect a sufficient bank settlement suppression effect during an earthquake and a bank breakage suppression effect during bank overflow (banking banking suppression effect), and Cost can be reduced.

本発明に係る盛土補強構造の第1の実施の形態を示すもので、(a)は盛土補強構造の概略を示す平面図、(b)は同、側断面図である。BRIEF DESCRIPTION OF THE DRAWINGS The 1st Embodiment of the embankment reinforcement structure which concerns on this invention is shown, (a) is a top view which shows the outline of a embankment reinforcement structure, (b) is the same sectional side view. 本発明に係る盛土補強構造の第2の実施の形態を示すもので、(a)は盛土補強構造の概略を示す平面図、(b)は同、正断面図である。The 2nd Embodiment of the embankment reinforcement structure which concerns on this invention is shown, (a) is a top view which shows the outline of a embankment reinforcement structure, (b) is a front sectional view. 本発明に係る盛土補強構造の第3の実施の形態を示すもので、盛土補強構造の概略を示す側断面図である。The 3rd Embodiment of the embankment reinforcement structure which concerns on this invention is shown, and it is a sectional side view which shows the outline of an embankment reinforcement structure. 本発明に係る盛土補強構造の第4の実施の形態を示すもので、盛土補強構造の概略を示す側断面図である。The 4th Embodiment of the embankment reinforcement structure which concerns on this invention is shown, and it is a sectional side view which shows the outline of an embankment reinforcement structure. 従来の盛土補強構造の一例を示すもので、(a)は盛土補強構造の概略を示す平面図、(b)は同、側断面図である。An example of the conventional embankment reinforcement structure is shown, (a) is a top view which shows the outline of a embankment reinforcement structure, (b) is the same sectional side view. 従来の盛土補強構造の他の例を示すもので、(a)は盛土補強構造の概略を示す平面図、(b)は同、側断面図である。The other example of the conventional embankment reinforcement structure is shown, (a) is a top view which shows the outline of an embankment reinforcement structure, (b) is the same sectional side view.

以下、図面を参照しながら本発明の実施の形態について説明する。
(第1の実施の形態)
図1は、本発明の第1の実施の形態を示す図であり、(a)は盛土補強構造の概略を示す平面図、(b)は同、側断面図である。
図1(a),(b)に示すように、第1の実施形態の盛土補強構造は、海や河川等の堤防となる盛土1を補強するためのものである。
盛土1は、中央の最も高い部分が水平な上面を有する天端1aとなっている。天端1aの左右には傾斜した法面1bがそれぞれ形成され、法面1bの上端部側が法肩部1cで、下端部側が法尻部1dとされている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
1A and 1B are views showing a first embodiment of the present invention, in which FIG. 1A is a plan view showing an outline of an embankment reinforcing structure, and FIG. 1B is a side sectional view thereof.
As shown in FIGS. 1 (a) and 1 (b), the embankment reinforcement structure of the first embodiment is for reinforcing the embankment 1 serving as a dike such as the sea or a river.
The embankment 1 is a top end 1a having a horizontal upper surface at the highest part in the center. Inclined slopes 1b are formed on the left and right of the top end 1a, respectively, with the upper end of the slope 1b being the shoulder 1c and the lower end being the slope 1d.

この盛土補強構造においては、連続する盛土1に、鋼矢板2からなる鋼矢板壁3が支持層4より浅い深さまで根入れされている。つまり、鋼矢板壁3の下端部は支持層4の上の液状化層5まで達している。また、鋼矢板壁3は盛土1の連続方向(図1(a)において上下方向、図1(b)において紙面と直交する方向)に沿って設けられている。鋼矢板壁3は複数の鋼矢板2を盛土1の連続方向に接続することによって構成されている。さらに、鋼矢板壁3は、盛土1の天端1aの両法肩部1c,1cから下方に延在するようにして設けられている。
鋼矢板2は、盛土1の天端1aの両法肩部1c,1cから盛土1を上下に貫通するように打設され、液状化層5中に達し、当該液状化層5に根入れされている。このような鋼矢板2を盛土1の連続方向に接続することよって、盛土1中には互いに対向し、かつ盛土1の連続方向に沿って延在する鋼矢板壁3,3が施工されている。
In this embankment reinforcement structure, a steel sheet pile wall 3 made of a steel sheet pile 2 is embedded in a continuous embankment 1 to a depth shallower than the support layer 4. That is, the lower end portion of the steel sheet pile wall 3 reaches the liquefied layer 5 on the support layer 4. The steel sheet pile wall 3 is provided along the continuous direction of the embankment 1 (the vertical direction in FIG. 1A and the direction orthogonal to the paper surface in FIG. 1B). The steel sheet pile wall 3 is configured by connecting a plurality of steel sheet piles 2 in the continuous direction of the embankment 1. Furthermore, the steel sheet pile wall 3 is provided so as to extend downward from both the shoulder portions 1c and 1c of the top end 1a of the embankment 1.
The steel sheet pile 2 is placed so as to vertically penetrate the embankment 1 from both the shoulders 1c and 1c of the top end 1a of the embankment 1, reaches the liquefied layer 5 and is embedded in the liquefied layer 5. ing. By connecting such steel sheet piles 2 in the continuous direction of the embankment 1, steel sheet pile walls 3 and 3 that are opposed to each other and extend along the continuous direction of the embankment 1 are constructed. .

前記鋼矢板壁3,3の頭部(上端部)は、盛土1の天端1aの高さ付近となる高さに位置している。そして、盛土1中に、2列に設けられた鋼矢板壁3,3で締め切られた地盤からなる構造骨格部7が形成されている。
鋼矢板壁3,3は、止水壁として、河川から浸透した水の流れである浸透流を遮り、盛土1に浸透破壊が生じるのを抑制するだけではなく、盛土1に前記構造骨格部7を形成することで強固な構造とするとともに、盛土1の略天端1aまで鋼矢板壁3,3を配置することで、盛土1の上部が崩壊するのを抑制し、地震や洪水等により外力が作用しても、河川が決壊するのを抑えている。
The heads (upper end portions) of the steel sheet pile walls 3, 3 are located at a height that is near the height of the top end 1 a of the embankment 1. And in the embankment 1, the structure frame | skeleton part 7 which consists of the ground cut off by the steel sheet pile wall 3 and 3 provided in 2 rows is formed.
The steel sheet pile walls 3, 3 not only block the seepage flow, which is the flow of water that has permeated from the river, but also prevent the seepage failure from occurring in the embankment 1. By forming the steel sheet pile walls 3 and 3 up to the approximate top end 1a of the embankment 1, the upper part of the embankment 1 is prevented from collapsing, and an external force is applied by an earthquake or a flood. Even if this works, the river is prevented from breaking down.

また、2列の鋼矢板壁3,3間には、例えば、タイロッド等の第2連結材6が盛土1の連続方向に沿って所定間隔毎に設けられている。第2連結材6は、2列の鋼矢板壁3,3間に架け渡されてこれらを連結している。これにより、洪水や地震等により大きな外力が作用した場合に、2列の鋼矢板壁3,3の上部が変形するのを防止している。なお、第2連結材6を設けないものとしてもよい。   Further, between the two rows of steel sheet pile walls 3, 3, for example, second connecting members 6 such as tie rods are provided at predetermined intervals along the continuous direction of the embankment 1. The 2nd connection material 6 is spanned between the two rows of steel sheet pile walls 3 and 3, and has connected these. This prevents the upper portions of the two rows of steel sheet pile walls 3 and 3 from being deformed when a large external force is applied due to a flood or an earthquake. Note that the second connecting member 6 may not be provided.

前記盛土1の法尻部1dには、支持層4まで根入れされた鋼製支持材10が盛土1の連続方向に所定間隔で離散的に配置されている。
この鋼製支持材10は、鋼管、鋼矢板、形鋼のうちの少なくともいずれかで1つで構成されているが、本実施の形態では、円筒状の鋼管による鋼管杭によって構成されており、当該鋼製支持材10の上端部は、盛土1の法尻部1dの高さ付近、つまり盛土1が設けられた地盤の表面付近に位置している。
また、鋼製支持材10は、盛土1の連続方向(図1(a)において上下方向)に所定間隔で離散的に配置されるが、本実施の形態では、盛土1の連続方向に隣り合う鋼製支持材10,10の間隔は、盛土1の連続方向において接続された2枚の鋼矢板2の長さと等しくなっている。
Steel support materials 10 that are embedded up to the support layer 4 are discretely arranged in the continuous direction of the embankment 1 at predetermined intervals on the slope 1 d of the embankment 1.
The steel support member 10 is composed of at least one of a steel pipe, a steel sheet pile, and a shaped steel, but in the present embodiment, the steel support member 10 is composed of a steel pipe pile made of a cylindrical steel pipe. The upper end portion of the steel support member 10 is located near the height of the slope 1d of the embankment 1, that is, near the surface of the ground where the embankment 1 is provided.
Moreover, although the steel support materials 10 are discretely arranged at predetermined intervals in the continuous direction of the embankment 1 (vertical direction in FIG. 1A), in this embodiment, they are adjacent to the continuous direction of the embankment 1. The distance between the steel support members 10 and 10 is equal to the length of the two steel sheet piles 2 connected in the continuous direction of the embankment 1.

また、前記鋼矢板壁3と前記各鋼製支持材10とは、それぞれ第1連結材11によって結合され、これによって、鋼矢板壁3が第1連結材11を介して鋼製支持材10によって支持されている。
第1連結材11は、地震時の盛土1の慣性力に耐えることができ、かつ、支持層4より浅い位置にある液状化層5が液状化し支持力が期待できない状態でも鋼矢板壁3の重量を支えることのできる強度を有している。第1連結材11には、地震時に盛土1が沈下することによって圧縮力が作用するため、第1連結材11は、少なくとも当該圧縮力に耐え得る強度を有しており、例えば断面H形等の軽量形鋼が好適に使用されている。
Further, the steel sheet pile wall 3 and the steel support members 10 are respectively coupled by the first connecting member 11, whereby the steel sheet pile wall 3 is connected by the steel support member 10 via the first connecting member 11. It is supported.
The first connecting member 11 can withstand the inertial force of the embankment 1 at the time of the earthquake, and the liquefied layer 5 at a position shallower than the support layer 4 is liquefied, and the support of the steel sheet pile wall 3 is not expected. It is strong enough to support the weight. Since the compressive force acts on the first connecting member 11 when the embankment 1 sinks during an earthquake, the first connecting member 11 has at least a strength that can withstand the compressive force. The lightweight section steel is preferably used.

また、第1連結材11は、盛土1の法面1bに沿って設けられている。本実施の形態では、第1連結材11は、法面1bより若干下側において、当該法面1bによって隠された状態で当該法面1bに沿わせるようにして設けられている。
ここで、第1連結材11は、鋼矢板壁3の重量を支持するためのものであるので、第1連結材11と水平面とのなす角をθとすると、0°<θ<60°に設定するのが好ましい。θが0°より小さくなると鋼製支持材10の天端が水平方向に広がるのに伴い、鋼矢板壁3の下端が水平方向に広がる挙動が助長され、60°より大きくなると第1連結材11の梁長さが長くなり、発生する曲げ応力が大きくなるからである。
Further, the first connecting material 11 is provided along the slope 1 b of the embankment 1. In the present embodiment, the first connecting member 11 is provided slightly below the slope 1b so as to be along the slope 1b while being hidden by the slope 1b.
Here, since the 1st connection material 11 is for supporting the weight of the steel sheet pile wall 3, if the angle | corner which the 1st connection material 11 and a horizontal surface make is set to (theta), it will be 0 degrees <(theta) <60 degrees. It is preferable to set. When θ is smaller than 0 °, the top end of the steel support member 10 spreads in the horizontal direction, and the behavior of the lower end of the steel sheet pile wall 3 spreads in the horizontal direction is promoted. This is because the length of the beam becomes longer and the bending stress generated becomes larger.

また、本実施の形態では、第1連結材11と鋼矢板壁3とはピン結合されているが、剛結合であってもよい。また、第1連結材11と鋼製支持材10とは剛結合されているが、ピン結合であってもよい。つまり、第1連結材11と、鋼矢板壁3および鋼製支持材10との結合は、それぞれピン結合であってもよいし、剛結合であってもよい。
さらに、本実施の形態では、図1(a)に示すように、第1連結材11は平面視において、鋼矢板壁3に対して略垂直に配置され、その先端部(上端部)は鋼矢板壁3の上端部でかつ、隣り合う鋼矢板2,2の接続部に連結されている。
また、本実施の形態では、鋼矢板壁3に対する第1連結材11の連結箇所と、第2連結材6の連結箇所とは、盛土1の連続方向において、異なる位置となっているが、同じ位置でもよい。
また、第2連結材6は、図1(a)に二点鎖線で示すように、交差していてもよい。この第2連結材6は、上述したようにタイロッドによって構成したが、これに限らず、圧縮力に耐え得る強度を有する断面H形等の軽量形鋼で構成してもよい。
Moreover, in this Embodiment, although the 1st connection material 11 and the steel sheet pile wall 3 are pin-coupled, a rigid coupling may be sufficient. Moreover, although the 1st connection material 11 and the steel support material 10 are rigidly connected, pin connection may be sufficient. That is, the connection between the first connecting member 11 and the steel sheet pile wall 3 and the steel support member 10 may be a pin connection or a rigid connection.
Furthermore, in this Embodiment, as shown to Fig.1 (a), the 1st connection material 11 is arrange | positioned substantially perpendicularly with respect to the steel sheet pile wall 3 in planar view, The front-end | tip part (upper end part) is steel. It is connected with the connection part of the steel sheet piles 2 and 2 which adjoin the upper end part of the sheet pile wall 3, and.
Moreover, in this Embodiment, although the connection location of the 1st connection material 11 with respect to the steel sheet pile wall 3 and the connection location of the 2nd connection material 6 become a different position in the continuous direction of the embankment 1, they are the same. It may be a position.
Moreover, the 2nd connection material 6 may cross | intersect, as shown by the dashed-two dotted line in Fig.1 (a). The second connecting member 6 is formed of a tie rod as described above, but is not limited thereto, and may be formed of a lightweight section steel having a cross-sectional H shape having a strength capable of withstanding a compressive force.

以上、本実施の形態によれば、盛土1の法肩部1cに設けられる鋼矢板壁3は、支持層4より浅い深さの液状化層5までしか根入れされていない一方、盛土1の法尻部1dに設けられる鋼製支持材10が支持層4まで根入れされているが、盛土1の連続方向に所定間隔で離散的に配置されているので、支持層4まで根入れされた鋼矢板壁を盛土1の連続方向に沿って連続して設けられている従来の構造に比して、工期や工費を低減してコストの低減を図ることができる。
また、鋼矢板壁3と各鋼製支持材10とがそれぞれ第1連結材11によって結合されることによって、鋼矢板壁3が第1連結材11を介して鋼製支持材10によって支持されているので、地震時に盛土内部の鋼矢板壁3の沈下を抑えることができ、地震時の盛土沈下抑制効果や越水時の破堤抑止効果(盛土破壊抑止効果)が期待される。
したがって、支持層4が深くに位置する地盤条件に対しても、十分な地震時の盛土沈下抑制効果や越水時の破堤抑止効果を期待でき、かつ、盛土1の法肩部1cの鋼矢板壁3の下端は液状化層5に留めて、法尻部1dの鋼製支持材10は盛土1の連続方向に所定間隔で離散的に設置し、これらを第1連結材11で結合させることで、上記効果を維持したままコストの低減を図ることができる。
As described above, according to the present embodiment, the steel sheet pile wall 3 provided in the shoulder portion 1c of the embankment 1 is rooted only up to the liquefied layer 5 having a depth shallower than the support layer 4, while Although the steel support material 10 provided in the method bottom part 1d is rooted to the support layer 4, since it was arrange | positioned discretely by the predetermined direction in the continuous direction of the embankment 1, it was rooted to the support layer 4 Compared to the conventional structure in which the steel sheet pile wall is continuously provided along the continuous direction of the embankment 1, it is possible to reduce the construction period and the construction cost and reduce the cost.
Moreover, the steel sheet pile wall 3 is supported by the steel support material 10 via the 1st connection material 11 by the steel sheet pile wall 3 and each steel support material 10 being couple | bonded by the 1st connection material 11, respectively. Therefore, the settlement of the steel sheet pile wall 3 inside the embankment can be suppressed at the time of an earthquake, and an embankment settlement suppressing effect at the time of an earthquake and a bank breakage inhibiting effect at the time of overflow (banking destruction inhibiting effect) are expected.
Therefore, even for ground conditions where the support layer 4 is located deeply, it is possible to expect sufficient embankment settlement suppression effect during an earthquake and bank breakage inhibition effect during overflow, and the steel shoulder 1c of the embankment 1 The lower end of the sheet pile wall 3 is fastened to the liquefied layer 5, and the steel support material 10 of the butt portion 1 d is discretely installed at a predetermined interval in the continuous direction of the embankment 1, and these are connected by the first connecting material 11. Thus, the cost can be reduced while maintaining the above effect.

また、鋼製支持材10は地盤に対する支持力の強い鋼管杭で構成されているので、鋼矢板壁3を第1連結材11を介して確実に支持できるとともに、鋼製支持材10を容易に調達できる。
さらに、地震時において盛土1が震動したり沈下する場合においても、第1連結材11が地震時の盛土の慣性力に耐えることができ、また、液状化層5が液状化し、鋼矢板壁3の支持力が期待できない状態でも、第1連結材11が鋼矢板壁3の重量を支えることができる。したがって、当該第1連結材11を介して鋼製支持材10によって、盛土沈下や越水時の破堤を抑止することができる。
Moreover, since the steel support material 10 is comprised with the steel pipe pile with the strong support force with respect to the ground, while being able to support the steel sheet pile wall 3 reliably via the 1st connection material 11, the steel support material 10 is easy. Can be procured.
Furthermore, even when the embankment 1 oscillates or sinks during an earthquake, the first connecting member 11 can withstand the inertia force of the embankment during the earthquake, and the liquefied layer 5 is liquefied, and the steel sheet pile wall 3 is liquefied. The first connecting member 11 can support the weight of the steel sheet pile wall 3 even in a state where the supporting force cannot be expected. Therefore, bank breakage at the time of embankment subsidence or overflowing can be suppressed by the steel support member 10 via the first connecting member 11.

また、第1連結材11が盛土1の法面1bに沿って設けられているので、第1連結材11の設置が容易であるとともに、当該第1連結材11を鋼矢板壁3の上端部と鋼製支持材10の上端部とに容易に連結できる。
また、盛土1の両法肩部1c,1cに対向して設けられた鋼矢板壁3,3どうしが盛土1の連続方向に所定間隔で離散的に配置された第2連結材6によって連結されているので、第1連結材11と第2連結材6の鋼矢板壁3に対する連結する位置を選定することで応力の発生箇所を分散させて調整することができる。
さらに第1連結材11と鋼矢板壁3および/または鋼製支持材10とはピン結合されているので、地震時に盛土沈下等によって第1連結材11に作用する曲げ変形を低減させることができる。
また、図1(a)に二点鎖線で示すように、第2連結材6を交差して配置すれば、盛土1の連続方向に卓越する加振に対しても、盛土1の補強効果を発揮することができる。
Moreover, since the 1st connection material 11 is provided along the slope 1b of the embankment 1, while installing the 1st connection material 11, it is the upper end part of the steel sheet pile wall 3 with the said 1st connection material 11 being easy. And the upper end of the steel support 10 can be easily connected.
In addition, the steel sheet pile walls 3, 3 provided facing both the shoulder portions 1 c, 1 c of the embankment 1 are connected by a second connecting member 6 that is discretely arranged at predetermined intervals in the continuous direction of the embankment 1. Therefore, by selecting the position where the first connecting member 11 and the second connecting member 6 are connected to the steel sheet pile wall 3, the locations where the stress is generated can be dispersed and adjusted.
Furthermore, since the 1st connection material 11, the steel sheet pile wall 3, and / or the steel support material 10 are pin-coupled, the bending deformation which acts on the 1st connection material 11 by embankment subsidence etc. at the time of an earthquake can be reduced. .
In addition, as shown by a two-dot chain line in FIG. 1A, if the second connecting members 6 are arranged so as to cross each other, the reinforcing effect of the embankment 1 can be obtained even against the vibration that excels in the continuous direction of the embankment 1. It can be demonstrated.

(第2の実施の形態)
図2は、本発明の第2の実施の形態を示す図であり、(a)は盛土補強構造の概略を示す平面図、(b)は同、正断面図である。
この第2の実施の形態が第1の実施の形態と異なる点は、盛土1の連続方向において隣り合う鋼製支持材10に連結された第1連結材11が交差している点である。
その他の構成は第1の実施の形態と同様であるので、共通構成部分には同一符号を付してその説明を省略ないし簡略化する。
(Second Embodiment)
2A and 2B are views showing a second embodiment of the present invention, in which FIG. 2A is a plan view schematically showing the embankment reinforcing structure, and FIG. 2B is a front sectional view thereof.
The second embodiment is different from the first embodiment in that first connecting members 11 connected to adjacent steel support members 10 in the continuous direction of the embankment 1 intersect.
Since other configurations are the same as those of the first embodiment, common components are denoted by the same reference numerals, and description thereof is omitted or simplified.

図2(a),(b)に示すように、盛土1の連続方向(図1(a)において上下方向、図1(b)において左右方向)において隣り合う鋼製支持材10には、第1の実施の形態と同様に、第1連結材11が平面視において、鋼矢板壁3に対して略垂直に配置され、その先端部(上端部)が鋼矢板壁3の上端部に連結されている。
これに加えて、他の第1連結材11がさらに導入され、当該第1連結材11が盛土1の連続方向において隣り合う鋼製支持材10に連結され、これら連結材11,11が交差している。
As shown in FIGS. 2 (a) and 2 (b), the steel supports 10 adjacent to each other in the continuous direction of the embankment 1 (vertical direction in FIG. 1 (a) and horizontal direction in FIG. 1 (b)) As in the first embodiment, the first connecting member 11 is arranged substantially perpendicularly to the steel sheet pile wall 3 in plan view, and the tip (upper end) thereof is connected to the upper end of the steel sheet pile wall 3. ing.
In addition to this, another first connecting member 11 is further introduced, the first connecting member 11 is connected to the steel support member 10 adjacent in the continuous direction of the embankment 1, and the connecting members 11, 11 intersect. ing.

交差する第1連結材11,11も盛土1の法面1bに沿って配置され、その下端部が鋼製支持材10の上端部に連結され、上端部が鋼矢板壁3の上端部に連結されている。交差する第1連結材11,11の鋼矢板壁3に対する連結箇所は、基本的に、鋼矢板壁3に対して略垂直に配置された第1連結材11の鋼矢板壁3に対する連結箇所と等しいが、鋼矢板壁3の平面視における凹凸形状によって、交差する第1連結材11,11を直接鋼矢板壁3に連結できない場合は、当該鋼矢板壁3に連結された前記垂直な第1連結材11の端部に連結することによって、間接的に鋼矢板壁3に連結してもよい。
なお、本実施の形態において、鋼矢板壁3に対して略垂直に配置された第1連結材11は省略してもよい。
The intersecting first connecting members 11, 11 are also arranged along the slope 1 b of the embankment 1, the lower end portion is connected to the upper end portion of the steel support member 10, and the upper end portion is connected to the upper end portion of the steel sheet pile wall 3. Has been. The connection location with respect to the steel sheet pile wall 3 of the 1st connection materials 11 and 11 which cross | intersect is fundamentally the connection location with respect to the steel sheet pile wall 3 of the 1st connection material 11 arrange | positioned substantially perpendicular | vertical with respect to the steel sheet pile wall 3. If the first connecting members 11, 11 that intersect each other cannot be directly connected to the steel sheet pile wall 3 due to the uneven shape in plan view of the steel sheet pile wall 3, the vertical first connected to the steel sheet pile wall 3 is the same. You may connect with the steel sheet pile wall 3 indirectly by connecting with the edge part of the connection material 11. FIG.
In the present embodiment, the first connecting member 11 disposed substantially perpendicular to the steel sheet pile wall 3 may be omitted.

本実施の形態によれば、前記第1の実施の形態と同様の効果を得ることができる他、盛土1の連続方向において隣り合う鋼製支持材10,10に連結された第1連結材11,11が交差しているので、盛土1の連続方向に卓越する加振に対しても、盛土1の補強効果を発揮することができる。   According to the present embodiment, the same effects as those of the first embodiment can be obtained, and the first connecting member 11 connected to the steel support members 10 and 10 adjacent in the continuous direction of the embankment 1. , 11 intersect, the reinforcing effect of the embankment 1 can be exerted even against the vibration that prevails in the continuous direction of the embankment 1.

(第3の実施の形態)
図3は、本発明の第3の実施の形態を示すもので、盛土補強構造の概略を示す側断面図である。
この第3の実施の形態が第1の実施の形態と異なる点は、第1連結材11を設ける位置である。
その他の構成は第1の実施の形態と同様であるので、共通構成部分には同一符号を付してその説明を省略ないし簡略化する。
(Third embodiment)
FIG. 3 shows a third embodiment of the present invention and is a side sectional view showing an outline of the embankment reinforcement structure.
The third embodiment is different from the first embodiment in the position where the first connecting member 11 is provided.
Since other configurations are the same as those of the first embodiment, common components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施の形態では、図3に示すように、第1連結材11が第1の実施の形態に比して下方に配置され、第1連結材11の少なくとも一部は盛土1の内部に設けられている。
具体的には、第1連結材11の略上半分が盛土1の内部に設けられ、略下半分が液状化層5に設けられている。そして、第1連結材11の上端部が盛土1の内部で鋼矢板壁3に連結され、下端部が液状化層5の内部で鋼製支持材10に連結されている。
In the present embodiment, as shown in FIG. 3, the first connecting member 11 is arranged below the first embodiment, and at least a part of the first connecting member 11 is provided inside the embankment 1. It has been.
Specifically, a substantially upper half of the first connecting material 11 is provided in the embankment 1 and a substantially lower half is provided in the liquefied layer 5. And the upper end part of the 1st connection material 11 is connected with the steel sheet pile wall 3 inside the embankment 1, and the lower end part is connected with the steel support material 10 inside the liquefied layer 5. FIG.

本実施の形態によれば、前記第1の実施の形態と同様の効果を得ることができる他、盛土1の内部に第1連結材11の一部(上半分)が設けられているので、地震時等において盛土1の地盤や液状化層5の地盤が緩衝材となり、第1連結材11に発生する曲げ変形が低減される。   According to the present embodiment, the same effect as in the first embodiment can be obtained, and a part (upper half) of the first connecting material 11 is provided inside the embankment 1. In the event of an earthquake or the like, the ground of the embankment 1 and the ground of the liquefied layer 5 serve as cushioning materials, and bending deformation generated in the first connecting material 11 is reduced.

(第4の実施の形態)
図4は、本発明の第4の実施の形態を示すもので、盛土補強構造の概略を示す側断面図である。
この第4の実施の形態が第1の実施の形態と異なる点は、第1連結材11にリブ11aを設けた点である。
その他の構成は第1の実施の形態と同様であるので、共通構成部分には同一符号を付してその説明を省略ないし簡略化する。
(Fourth embodiment)
FIG. 4 shows a fourth embodiment of the present invention and is a side sectional view showing an outline of the embankment reinforcement structure.
The fourth embodiment differs from the first embodiment in that ribs 11a are provided on the first connecting member 11.
Since other configurations are the same as those of the first embodiment, common components are denoted by the same reference numerals, and description thereof is omitted or simplified.

本実施の形態では、図4に示すように、第1連結材11には、盛土1の内部に埋め込まれるリブ11aが第1連結材11から突出して設けられている。
リブ11aは、水平面に対して所定の角度で傾斜している。
リブ11aは、棒状のものであるが、その表面に盛土1の地盤に食い込むような凹凸を設けてもよい。
In the present embodiment, as shown in FIG. 4, the first connecting member 11 is provided with ribs 11 a embedded in the embankment 1 so as to protrude from the first connecting member 11.
The rib 11a is inclined at a predetermined angle with respect to the horizontal plane.
Although the rib 11a is a rod-shaped thing, you may provide the unevenness | corrugation which bites into the ground of the embankment 1 on the surface.

本実施の形態によれば、第1連結材11に盛土1の内部に埋め込まれるリブ11aが第1連結材11から突出して設けられているので、地震時等において沈下する盛土1の地盤からの抵抗が増し第1連結材の曲げ変形が低減される。   According to the present embodiment, the rib 11a embedded in the embankment 1 is provided in the first connecting member 11 so as to protrude from the first connecting member 11, so that the embedding from the ground of the embankment 1 that sinks during an earthquake or the like. Resistance is increased and bending deformation of the first connecting member is reduced.

1 盛土
1a 天端
1b 法面
1c 法肩部
1d 法尻部
2 鋼矢板
3 鋼矢板壁
4 支持層
5 液状化層
6 第2連結材
10 鋼製支持材
11 第1連結材
11a リブ
DESCRIPTION OF SYMBOLS 1 Embankment 1a Top edge 1b Slope 1c Slope 1d Slope 2 Steel sheet pile 3 Steel sheet pile wall 4 Support layer 5 Liquefaction layer 6 Second connection material 10 Steel support material 11 First connection material 11a Rib

Claims (9)

連続する盛土の略天端の範囲内に、鋼矢板および/または鋼管矢板からなる鋼矢板壁が、前記盛土の連続方向に沿って1列以上設けられ、前記鋼矢板壁が支持層より浅い深さまで根入れされた盛土補強構造において、
前記盛土の法尻部に、前記支持層まで根入れされた鋼製支持材が前記盛土の連続方向に所定間隔で離散的に配置され、
前記鋼矢板壁と前記各鋼製支持材とがそれぞれ第1連結材によって結合されることによって、前記鋼矢板壁が前記第1連結材を介して前記鋼製支持材によって支持され、
前記第1連結材は、前記盛土の法面に沿って設けられ、
前記盛土の連続方向において隣り合う前記鋼製支持材に連結された前記第1連結材が交差していることを特徴とする盛土補強構造。
One or more steel sheet pile walls made of steel sheet piles and / or steel pipe sheet piles are provided along the continuous direction of the embankment within the approximate top end of the continuous embankment, and the steel sheet pile wall is shallower than the support layer. In the embankment reinforcement structure,
The steel support material rooted up to the support layer is discretely arranged at a predetermined interval in the continuous direction of the embankment at the bottom of the embankment,
The steel sheet pile wall is supported by the steel support material via the first connection material by the steel sheet pile wall and the steel support materials being coupled by the first connection material, respectively.
The first connecting member is provided along the slope of the embankment,
The embankment reinforcing structure, wherein the first connecting members connected to the steel support members adjacent to each other in the continuous direction of the embankment intersect.
連続する盛土の略天端の両法肩部からそれぞれ下方に延在するようにして設けられた鋼矢板および/または鋼管矢板からなる鋼矢板壁が、前記盛土の連続方向に沿って設けられ、前記鋼矢板壁が支持層より浅い深さまで根入れされた盛土補強構造において、
前記盛土の法尻部に、前記支持層まで根入れされた鋼製支持材が前記盛土の連続方向に所定間隔で離散的に配置され、
前記鋼矢板壁と前記各鋼製支持材とがそれぞれ第1連結材によって結合されることによって、前記鋼矢板壁が前記第1連結材を介して前記鋼製支持材によって支持され、
前記第1連結材は、地震時の前記盛土の慣性力に耐えることができ、かつ、前記支持層より浅い位置にある液状化層が液状化し支持力が期待できない状態でも前記鋼矢板壁の重量を支えることのできる強度を有し
前記盛土の両法肩部に前記鋼矢板壁が対向して設けられ、これら鋼矢板壁どうしが前記盛土の連続方向に所定間隔で離散的に配置された第2連結材によって連結され、
前記第2連結材が交差していることを特徴とする盛土補強構造。
A steel sheet pile wall made of steel sheet piles and / or steel pipe sheet piles provided so as to extend downward from the respective shoulders of the approximate top end of the continuous fill is provided along the continuous direction of the fills, In the embankment reinforcement structure in which the steel sheet pile wall is embedded to a depth shallower than the support layer,
The steel support material rooted up to the support layer is discretely arranged at a predetermined interval in the continuous direction of the embankment at the bottom of the embankment,
The steel sheet pile wall is supported by the steel support material via the first connection material by the steel sheet pile wall and the steel support materials being coupled by the first connection material, respectively.
The first connecting member can withstand the inertia force of the embankment at the time of an earthquake, and the weight of the steel sheet pile wall even when the liquefied layer at a position shallower than the support layer is liquefied and the support force cannot be expected. It has a strength capable of supporting,
The steel sheet pile walls are provided opposite to both shoulders of the embankment, and these steel sheet pile walls are connected by a second connecting member that is discretely arranged at a predetermined interval in the continuous direction of the embankment,
The embankment reinforcement structure characterized by the said 2nd connection material crossing .
前記鋼製支持材は、鋼管、鋼矢板、形鋼のうちの少なくともいずれかで1つで構成されていることを特徴とする請求項1または2に記載の盛土補強構造。   The embankment reinforcement structure according to claim 1 or 2, wherein the steel support material is formed of one of at least one of a steel pipe, a steel sheet pile, and a shaped steel. 前記第1連結材は、前記盛土の法面に沿って設けられていることを特徴とする請求項1〜3のいずれか1項に記載の盛土補強構造。   The embankment reinforcing structure according to any one of claims 1 to 3, wherein the first connecting member is provided along a slope of the embankment. 盛土の両法肩部に前記鋼矢板壁が対向して設けられ、これら鋼矢板壁どうしが前記盛土の連続方向に所定間隔で離散的に配置された第2連結材によって連結されていることを特徴とする請求項1、3または4に記載の盛土補強構造。 The steel sheet pile walls are provided facing both shoulders of the embankment, and the steel sheet pile walls are connected by a second connecting member that is discretely arranged at a predetermined interval in the continuous direction of the embankment. The embankment reinforcement structure according to claim 1, 3, or 4 . 前記第2連結材が交差していることを特徴とする請求項5に記載の盛土補強構造。   The embankment reinforcement structure according to claim 5, wherein the second connecting members intersect each other. 前記第1連結材の少なくとも一部は前記盛土の内部に設けられていることを特徴とする請求項1〜6のいずれか1項に記載の盛土補強構造。   The embankment reinforcing structure according to any one of claims 1 to 6, wherein at least a part of the first connecting member is provided inside the embankment. 前記第1連結材と、前記鋼矢板壁および/または前記鋼製支持材とはピン結合されていることを特徴とする請求項1〜7のいずれか1項に記載の盛土補強構造。   The embankment reinforcement structure according to any one of claims 1 to 7, wherein the first connecting member, the steel sheet pile wall and / or the steel support member are pin-coupled. 前記第1連結材には前記盛土の内部に埋め込まれるリブが前記第1連結材から突出して設けられていることを特徴とする請求項1〜8のいずれか1項に記載の盛土補強構造。   The embankment reinforcement structure according to any one of claims 1 to 8, wherein a rib embedded in the embankment is provided in the first connecting member so as to protrude from the first connecting member.
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